"Graham" wrote in message
...

snip

No, they would be two or more LEDs in the same package.
You can have a two colour LED with only two wires but
internally it's two back-to back LED's with steering diodes
so the colour depends on the polarity.

AIUI the LEDs, within the common housing, do the 'steering', depending
on which tail is ve+. Also there are tri-colour LEDs which emit their
third colour when supplied with an AC supply rather than DC.